not work -mvddc wnidows 7 PhoenixMiner 4.7c 4.6c . eror miner. in version 4.5 everything works.
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100


PhoenixMiner.exe -amd    -mi 14 -coin ETH -mode 1 -wdog 0 -pool eu1.ethermine.org:4444 -worker CATx -wal 0x57119a8879088ae78442533c2e9e6649631004c6 -pass x  -clkernel 2  -gser 2 -proto 3 -mvddc 900 -mclock 2100 -gt 0 -rvram -1